A profit margin expresses profit as a percentage of revenue. Gross margin, operating margin, and net margin each subtract a different set of costs, so they answer different questions about profitability.
How it works
Gross margin focuses on revenue after direct costs of producing goods or services. Operating margin goes further by including operating expenses, while net margin includes additional items such as interest and taxes.
Margins can improve through higher prices, better product mix, scale, or lower costs. They can weaken when input costs, labor, marketing, depreciation, or other expenses grow faster than revenue.
Why it matters
Margins help distinguish growth in size from growth in economic quality. A company can sell much more while keeping less profit from each dollar of sales.
Investors also compare margins with company history and peers because different industries have very different normal profitability levels.
A simple market example
Revenue grows from $100 million to $120 million, but operating profit stays at $15 million. The business is larger, yet its operating margin falls from 15% to 12.5%.
Common mistakes
Referring to 'the margin' without specifying gross, operating, or net margin.
Assuming a falling margin is always bad without checking whether a company is deliberately investing for future growth.
Frequently asked questions
What is the difference between gross margin and operating margin?
Operating margin subtracts more operating expenses after gross profit, so it captures a broader layer of business costs.
Can margins be negative?
Yes. If the relevant costs exceed revenue, the margin can be below zero.
Is a higher margin always better?
Not automatically. The right comparison depends on the business model, growth stage, and investment cycle.
Educational content only. Definitions describe common market usage and may vary by jurisdiction, instrument, or institution.